Steam-boiler



(No Model.)

2 Sheets-Sheet 1.

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2 Sheets-Sheet 2.

Q. J. M. HANA.

(No Model.)

STEAM BOILER.

Patented Sept. 6, 1887.

UNITED STATES PArnNr rricn.

OLEMENTINA J. M. HANA, OF ST. LOUIS, MISSOURT.

STEAM-BOlLER.

SPECIFICATION forming part of Letters Patent No. 369,448, dated September 6, 1887.

Application filed October 7,1886. Serial No. 915.565.

To aZZ 107mm' it may conccrn:

Be it known that I, `CLEMENTDIA J. M. HANA, of St. Louis, Missouri, have made a new and useful Improvement in Steam-Boilers, of which the following is a full, clear, and exact description.

The improvement relates to the construction of the lower portion of the boiler, by means whereof the heating-surface of the boileris increased, its Safety promoted, and the fuel consumed to better advantage.

It consists in Shaping the shell of the boiler so as to form one or more fines extending in the bottom of the boiler from above the fireplace of the boiler to the farther end of the boiler, and being open at thehottom to adniit the heat-currentand the products of combustion from the fire-place, and also from the custoniary fiue leading from the fire-place bcneath the boiler, which current and products, after reaching the farther ,end of the boiler, are directedintoireturn-fluesin the boiler, and thence into the uptake, substantially as is represented in the annexed drawings, making part of this specification, in which- Figure 1 is a view in perspective of the improved boiler, the shell being broken away to exhibit the intcrior. Fig. 2is a Vertical crosssection on the line 2 2 ot' Fig. 3. Fig. 3 is a Vertical longitudinal section on the line 3 3 of Fig 2, and Fig. i is a horizontal section onthe line 4 of Fig, 3.

The same letters of reference denote the same part-s. w

The boilerA, aside from its improved feature, may be constructed in the usual nianner. Its lower portion, however, consists of what ;may be termed a series of legs, B B B',which extend throughont the length of the boiler, and which are spaced apart from each other to form fiues O C, which extend longitudinally in the boiler and at the bottom open to the outer air, so that when the boiler is placed in position, as in Figs. 2, 3, 4, the heat and the products of combnstion may pass from the fire-place D and the flue E upward into the flues O O, and, after traversing those flues, enter the fine-space F, which serves to direct the current into the return-does G G, which are formed, respcctively, at opp'osite sides 'of the series of flues O C in the outer legs, B B, re-

'perfect consuniption of the fuel.

(No model.)

spectively. The course of the products of combustion is then through the return-flues into the uptake H.

The fiues G, by means of a suitable partitionsay of fire-briclt--I, Figs. 3, 1-, are eonst-ructed to prcvent a direct draft from the fire-place 'through the forward end of the fiues G into the uptake H, and to cause the course to be, as stated, through the fiues O and G, and as indicated by the arrows in Fig. 4.

Any number of ilues O may be employed, and in height they may eXtend npward nearly to the water-line indicated by the broken line az, Fig. 1. It is manifest that the heating-surface of the boiler is large] y increased by means of the fiues O, and that these fines can be readily cleaned by reason of the flues being open at the bottom. The heat can also, for the same reason, pass upward into these fiues throughout or substantially thronghout the entire length of the iiues. It is also apparent that the fiues serve to render the lower portion of the boiler snbstantially sectional, and thereby to strengthcn it. But an especial advantage derived from the flnes C is the more The fiues afford numerous spaces, into which the partially-consumed fuel, together with a suitable quantity of air, can pass and be more thoroughly bnrned than if the escape from the fireplace Were solely through the flue E beneath the boiler. To this end the air may, in any desirable quantity, be admitted into the flues C, and at any point or points along thelength of the fiues'.

The iniprovement is not eonfined to stationary boilers, as it can be applied to loconiotiveboilers. Nor is any special form of fire-place essential to the operation of thcimprovement. The construction exhibited in the drawings is considered, however, a desirableone for attaining theimproved results described. There may be hand-holes (t, Fig. 1, for the purpose of reaching the interior of the lcgs B B'. The covers and fastenings for these hand-holes are not shown in the drawings.

So far as the fiues O by themselves are concerned, they need not necessarily be extended in a longitudinal direction in the boiler, provided always they are open at the bottoni to admit the heat.

IOC-

I am aware of Patent No. 13,761, and do not v 2. In combination with the fire-place Dand claim what is shown therein, as the structure flne E, the open-bottom flues O, fire-brick I, of my device differs essentially from what is the side flnes, G, and the uptake H, substanfonnd in that. tially as and in the manner set forth. 5 I clam- 1. In combination with the open-bottom CLEMENTINA J. M. HAYNA. flues O, the fire-brick I, which stops the forward ends of such flnes, and the side retnrn- Vitnesses: flues in the legs B B, substantially as de- C. D. MOODY, lIo scribed. B. F. RIX. 

